Giant Improvement of the Performance of ZnO Nanowire Photodetectors by Au Nanoparticles

Liu, Kewei; Sakurai, Minoru; Liao, Meiyong; Aono, Masakazu

doi:10.1021/jp108320j

Cited by 327 publications

(273 citation statements)

References 33 publications

(68 reference statements)

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“…Such superb optical properties can be ascribed to their unique geometry: unlike the conventional solid gold nanoparticles with only one exterior surface, the HGNs have one more surface within the cavity. The two faces are able to facilitate coupling at light illumination, thus leading to relatively large field enhancement [41]. which is highly beneficial for light detection.…”

Section: Resultsmentioning

confidence: 99%

“…For instance, Sakurai et al developed a high performance Au nanoparticles@ZnO nanowire photodetectors. It was observed that the dark current decrease by 100 times and the on/off ratio was considerably increased after decoration of plasmonic Au nanoparticles [18]. Moreover, Hu's group observed that a large enhancement of photocurrent response is obtained by decorating multi-layer MoS 2 with plasmonic gold nanoparticles array.…”

mentioning

confidence: 99%

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Plasmonic hollow gold nanoparticles induced high-performance Bi2S3 nanoribbon photodetector

Liang

Zhang

et al. 2017

Nanophotonics

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Plasmonic hollow gold nanoparticles induced high-performance Bi2S3 nanoribbon photodetector

Liang

Zhang

et al. 2017

Nanophotonics

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“…In addition, functional devices consisting of a noble metal (e.g., Au [132,133] and Ag [134][135][136][137]) coated on semiconductor nanostructures have inspired extensive research effort. Such devices can realize superior optoelectronic properties to those without a metal coating because their LSPR effect leads to strong scattering and absorption of incident light, efficient separation of photogenerated electron-hole pairs, and rapid transport of charge carriers at the metal/semiconductor interface.…”

Section: Photodetectorsmentioning

confidence: 99%

“…Such devices can realize superior optoelectronic properties to those without a metal coating because their LSPR effect leads to strong scattering and absorption of incident light, efficient separation of photogenerated electron-hole pairs, and rapid transport of charge carriers at the metal/semiconductor interface. Liu and coworkers fabricated ZnO nanowire photodetectors coated with Au nanoparticles [132]. The ratio of photocurrent to dark current of the ZnO photodetector with Au nanoparticles reached up to 5 × 10 6 , which was much larger than that of the device without Au nanoparticles (around 10 3 ).…”

Section: Photodetectorsmentioning

confidence: 99%

One-Dimensional Zinc Oxide Nanomaterials for Application in High-Performance Advanced Optoelectronic Devices

et al. 2018

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Unlike conventional bulk or film materials, one-dimensional (1D) semiconducting zinc oxide (ZnO) nanostructures exhibit excellent photoelectric properties including ultrahigh intrinsic photoelectric gain, multiple light confinement, and subwavelength size effects. Compared with polycrystalline thin films, nanowires usually have high phase purity, no grain boundaries, and long-distance order, making them attractive for carrier transport in advanced optoelectronic devices. The properties of one-dimensional nanowires-such as strong optical absorption, light emission, and photoconductive gain-could improve the performance of light-emitting diodes (LEDs), photodetectors, solar cells, nanogenerators, field-effect transistors, and sensors. For example, ZnO nanowires behave as carrier transport channels in photoelectric devices, decreasing the loss of the light-generated carrier. The performance of LEDs and photoelectric detectors based on nanowires can be improved compared with that of devices based on polycrystalline thin films. This article reviews the fabrication methods of 1D ZnO nanostructures-including chemical vapor deposition, hydrothermal reaction, and electrochemical deposition-and the influence of the growth parameters on the growth rate and morphology. Important applications of 1D ZnO nanostructures in optoelectronic devices are described. Several approaches to improve the performance of 1D ZnO-based devices, including surface passivation, localized surface plasmons, and the piezo-phototronic effect, are summarized.

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“…On many MO-NW light sensors, these surface effects lead to obtain photoresponse values well beyond those achieved in mesoscopic devices, at the expense of showing long recovery times. 10,11 Unfortunately, these slow transients hinder their practical application in many fields.…”

mentioning

confidence: 99%

Fast response ZnO:Al/CuO nanowire/ZnO:Al heterostructure light sensors fabricated by dielectrophoresis

Marín

García-Núñez

Ruiz

et al. 2013

Applied Physics Letters

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Metal oxide nanowire (NW) photoconductors tend to exhibit high photoconductive gains and long recovery times mainly due to surface effects. In this work, p-type CuO NWs are synthesized by direct oxidation of copper and deposited on n-type ZnO:Al electrodes by dielectrophoresis. The heterostructure is electro-optically characterized showing recovery times in the 10 ls range, mainly limited by the resistance-capacitance product of the equivalent circuit, without signs of persistent effects. The fast response is attributed to short transit times across space charge regions built between CuO and ZnO:Al materials and fast carrier recombination at neutral regions. V C 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4811128] Metal oxides (MOs) are attractive compounds for industrial purposes since high-quality crystal nanowires (NWs) can be obtained by cost-effective methods that do not require expensive vacuum systems or environmentally unfriendly chemical reactants. The high surface-to-volume ratio of such nanostructures leads to the enhancement of the device sensitivity prompting their use as building blocks in low-cost optical, biological, and gas sensors. [1][2][3][4] Regarding light detectors, NWs may help to reduce the operation voltages of high-gain sensors through the proximity of the surface and the subsequent enhancement of the local electric field. In addition, their small dimensions open possibilities for the integration of NWs from different materials or with different structures such as core-shell, p-n junctions, or quantum well superlattices. 5,6 However, the development of NW-based devices has to face issues such as the lack of performance reproducibility or the need for advanced methods to handle and manipulate nanostructures on a high demand basis. Dielectrophoresis (DEP) has long been used in biochemistry to separate biomolecules, but nowadays, it has also been proved to be a costeffective technique to align NWs between metal electrodes. 7,8 The technique is highly scalable and makes possible the precise placement of multiple NWs on Si integrated circuits at room temperature. Thus, ZnO NW devices have been fabricated using this method on Au electrodes. 9 Due to their high conductance and mechanical stability, Al-doped ZnO (AZO) is an alternative material to metals for the preparation of DEP electrodes. Moreover, its visible transparency also enables the alignment of NWs on desired locations of transparent substrates aiming at the development of sensors in transparent electronics.Concerning the performance of NW devices, the understanding of the surface effects is crucial since many of the electrical and optical characteristics are strongly influenced by surface electronic states. On many MO-NW light sensors, these surface effects lead to obtain photoresponse values well beyond those achieved in mesoscopic devices, at the expense of showing long recovery times. 10,11 Unfortunately, these slow transients hinder their practical application in many fields.Recently, p-type cupric oxide (CuO) NWs ha...

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Giant Improvement of the Performance of ZnO Nanowire Photodetectors by Au Nanoparticles

Cited by 327 publications

References 33 publications

Plasmonic hollow gold nanoparticles induced high-performance Bi2S3 nanoribbon photodetector

Plasmonic hollow gold nanoparticles induced high-performance Bi2S3 nanoribbon photodetector

One-Dimensional Zinc Oxide Nanomaterials for Application in High-Performance Advanced Optoelectronic Devices

Fast response ZnO:Al/CuO nanowire/ZnO:Al heterostructure light sensors fabricated by dielectrophoresis

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